Abstract
Paracaspase (MALT1), a member of an evolutionarily conserved superfamily of caspase-like proteins, has been shown to bind and colocalize with the protein Bcl10 in vitro and, because of this association, has been suggested to be involved in the CARMA1-Bcl10 pathway of antigen-induced nuclear factor kappaB (NF-kappaB) activation. We demonstrate that primary T and B lymphocytes from paracaspase-deficient mice are defective in antigen-receptor-induced NF-kappaB activation, cytokine production, and proliferation. Paracaspase acts downstream of Bcl10 to induce NF-kappaB activation and is required for the normal development of B cells, indicating that paracaspase provides the missing link between Bcl10 and activation of the IkappaB kinase complex.
MeSH Terms
Adaptor Proteins, Signal Transducing
Animals
Antibody Formation
Antigens, CD/analysis
B-Cell CLL-Lymphoma 10 Protein
B-Lymphocyte Subsets/immunology,physiology
B-Lymphocytes/immunology,metabolism,physiology
Caspases
Cell Differentiation
Cell Division
Cell Survival
Cells, Cultured
Cytokines/metabolism
Gene Deletion
Gene Targeting
Guanylate Kinases
I-kappa B Kinase
Lymphocyte Activation
Lymphoma, B-Cell, Marginal Zone/chemistry,metabolism
Mice
Mice, Inbred C57BL
Mucosa-Associated Lymphoid Tissue Lymphoma Translocation 1 Protein
NF-kappa B/metabolism
Neoplasm Proteins/chemistry,metabolism
Nucleoside-Phosphate Kinase/metabolism
Phosphorylation
Protein Serine-Threonine Kinases/metabolism
Protein Structure, Tertiary
Receptors, Antigen, B-Cell/metabolism
Receptors, Antigen, T-Cell/metabolism
Signal Transduction
T-Lymphocyte Subsets/immunology,physiology
T-Lymphocytes/immunology,metabolism,physiology
Transfection
Chemicals
Adaptor Proteins, Signal Transducing
Antigens, CD
B-Cell CLL-Lymphoma 10 Protein
BCL10 protein, human
Bcl10 protein, mouse
Cytokines
NF-kappa B
Neoplasm Proteins
Receptors, Antigen, B-Cell
Receptors, Antigen, T-Cell
Protein Serine-Threonine Kinases
Chuk protein, mouse
I-kappa B Kinase
Ikbkb protein, mouse
Ikbke protein, mouse
Nucleoside-Phosphate Kinase
Guanylate Kinases
Caspases
Malt1 protein, mouse
Mucosa-Associated Lymphoid Tissue Lymphoma Translocation 1 Protein
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Ruefli-Brasse Astrid A
Molecular Oncology Department, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA.
French Dorothy M
Dixit Vishva M